Many small-scale farmers in East Africa find it hard to grow crops year-round because of drought or too much rain. So a student team from Pennsylvania State University came up with the idea of kits to build small, easy-to-set up greenhouses to help the farmers increase their production up to 20 percent. Team member Arianna DeReus says they're constructed with PVC pipe and rice bags.
“Our design is affordable, durable and expandable, and it’s also made of local materials," DeReus explained. "That reduces transportation costs and it also supports the local economy.”
The greenhouse is part of an exhibition called Open Minds, sponsored by National Collegiate Inventors and Innovators Alliance. Each year, it gives grants to more than 50 college student teams which create business models using innovative technology to help people around the world. The top teams are chosen for an annual exhibition.
The Alliance was founded in 1995 by the Lemelson Foundation, which supports grassroots inventors. Director Carol Dahl says the young entrepreneurs are helping to lift people out of poverty.
1. portable adj. 手提的，便携式的；轻便的
I always carry a portable computer with me.
2. vaccine n. 疫苗；牛痘苗
Seven million doses of vaccine are annually given to British children.
3. panel n.镶板；板条；护墙板；窗玻璃片；
She burned the image of a tiger into the wood panel.
The meeting was sponsored by 16 countries.
5.Grassroot n. 草根
Opinion at the grassroots level is sympathetic to the strikers.
6.lift out 举起；提升；从…抬出来
Carefully lift out the little gear and the electromagnet.